陈熙,马永迪,翟笑影,史鑫,王帅,史圆圆

• 1:天津工业大学材料科学与工程学院
• 2:天津工业大学省部共建分离膜与膜过程国家重点实验室

摘要(Abstract)：

为了去除废水中的4-硝基苯酚,制备了一种银-聚酰胺/聚偏氟乙烯(Ag-PA/PVDF)复合膜。首先合成聚甲基丙烯酸(PMAA)微球,然后将其与聚偏氟乙烯(PVDF)共混制备了PVDF/PMAA聚合物膜,再在其表面通过界面聚合和原位负载Ag纳米粒子催化剂构建分离层,得到Ag-PA/PVDF复合催化膜;采用傅里叶红外光谱仪(FTIR)、X射线光电子能谱仪(XPS)、扫描电子显微镜(SEM)和电感耦合等离子体发射光谱仪(ICP)等对膜结构进行表征,并用复合膜对4-硝基苯酚进行催化还原去除测试。结果表明:复合膜由PVDF/PMAA支撑层和聚酰胺-Ag纳米粒子催化分离表面层组成;复合膜催化的4-硝基苯酚还原遵循一级反应动力学,表观活化能为E_a=13.45 k J/mol;随着膜表面催化剂负载量的增加,催化反应速率常数由0.062 1 min~(-1)增加到0.101 3 min~(-1);随着温度升高,催化反应速率常数由0.088 9 min~(-1)增加到0.122 1 min~(-1);经10次循环反应后,复合膜催化还原4-硝基苯酚的去除率在93.5%以上,具有良好的稳定性。

关键词(KeyWords)： 聚偏氟乙烯(PVDF);银纳米粒子;复合膜;催化;4-硝基苯酚

Abstract:

Keywords:

基金项目(Foundation): 天津市自然科学基金青年基金资助项目（19JCQNJC02900）;; 天津市高校科技发展基金计划资助项目（2017ZD04）

作者(Author): 陈熙,马永迪,翟笑影,史鑫,王帅,史圆圆

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